CN108650549B - Digital television data management method and system - Google Patents
Digital television data management method and system Download PDFInfo
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- CN108650549B CN108650549B CN201810437114.0A CN201810437114A CN108650549B CN 108650549 B CN108650549 B CN 108650549B CN 201810437114 A CN201810437114 A CN 201810437114A CN 108650549 B CN108650549 B CN 108650549B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/439—Processing of audio elementary streams
- H04N21/4394—Processing of audio elementary streams involving operations for analysing the audio stream, e.g. detecting features or characteristics in audio streams
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/04—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks
- H04L63/0428—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/08—Network architectures or network communication protocols for network security for authentication of entities
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/439—Processing of audio elementary streams
- H04N21/4398—Processing of audio elementary streams involving reformatting operations of audio signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs
- H04N21/44008—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs involving operations for analysing video streams, e.g. detecting features or characteristics in the video stream
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs
- H04N21/4402—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display
- H04N21/440218—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display by transcoding between formats or standards, e.g. from MPEG-2 to MPEG-4
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/441—Acquiring end-user identification, e.g. using personal code sent by the remote control or by inserting a card
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/45—Management operations performed by the client for facilitating the reception of or the interaction with the content or administrating data related to the end-user or to the client device itself, e.g. learning user preferences for recommending movies, resolving scheduling conflicts
- H04N21/4508—Management of client data or end-user data
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/45—Management operations performed by the client for facilitating the reception of or the interaction with the content or administrating data related to the end-user or to the client device itself, e.g. learning user preferences for recommending movies, resolving scheduling conflicts
- H04N21/462—Content or additional data management, e.g. creating a master electronic program guide from data received from the Internet and a Head-end, controlling the complexity of a video stream by scaling the resolution or bit-rate based on the client capabilities
- H04N21/4623—Processing of entitlement messages, e.g. ECM [Entitlement Control Message] or EMM [Entitlement Management Message]
Abstract
The invention belongs to the field of digital televisions, and particularly relates to a digital television data management method and a digital television data management system, a digital television data management method and a digital television data management method, which comprise the following operation steps: receiving a data stream, dividing the data stream into a plurality of data packets, generating a data packet key according to a time sequence of the data packets, encrypting the data packets according to the key, adding a mark to the data packet key according to a time sequence number, wherein the mark does not mark the content of the data packet key, separating the data packet key and the mark according to a received instruction, and descrambling data by using the data packet key separated from the mark; the digital television data management system comprises a receiving module, a data stream processing module, an encryption module, a disassembly module, an authentication module and a playing module. By considering the inherent time sequence stability of the streaming media data, the key information is quickly retrieved by using the time sequence of the streaming data, the data transmission efficiency is increased, and the viewing effect of the playing terminal is increased by the way.
Description
Technical Field
The invention belongs to the field of digital televisions, and particularly relates to a digital television data management method and a digital television data management system.
Background
Digital television is the third generation television of which the television technology is developed from black and white television to color television, and the digital television, mobile communication and the internet form three major information infrastructures. In data transmission of digital television, methods of transmission scrambling and descrambling may be involved. The scrambling and descrambling technique is used to alter or control certain characteristics of the transmitted service (program) under the control of the transmitting CA system, so that unauthorized users cannot obtain the benefits provided by the service; descrambling technology, providing an encryption message at the transmitting end, so that an authorized user end descrambler can decrypt the data. This information is controlled by the CA system and is arranged in encrypted form in the transport stream information to prevent unauthorized users from descrambling directly with this information. The different CA systems manage and deliver this information in a very different way. Scrambling is generally performed by disturbing a video, audio or data stream with a scrambling sequence at a transmitting end to scramble data. The scrambling sequence is generated by a pseudo-random sequence generator, and the scrambling sequence generated by the pseudo-random sequence generator can be deduced under the condition that the initial conditions are known. The initial condition of the pseudo-random sequence generator is controlled by a Control Word. At the receiving end there is also an identical pseudo-random sequence generator to which the control word CW is sent, so that a descrambling sequence is obtained and then restored with the descrambling sequence. In order to realize security, the control word must be transmitted after being encrypted. The receiving end can regenerate the control word by applying the decryption program after being authorized, namely, when descrambling, a corresponding key needs to be found to realize descrambling.
Disclosure of Invention
The invention aims to provide a digital television data management method and a digital television data management system, aiming at solving the problem that no better digital television data management method and system exist at present.
In order to achieve the above object, there is provided a digital television data management method, comprising the following operation steps:
receiving an audio-video data stream;
dividing the audio-video data stream into a plurality of data packets;
generating a data packet key according to the time sequence of the data packet, and encrypting the data packet according to the key;
adding a mark to the data packet key according to the time sequence number, wherein the mark is a mark which does not encode the content of the data packet key;
separating the data packet key and the tag according to the received instruction;
using the data packet key separated from the mark to descramble the data;
descrambling the data by using the marked data packet key according to the received instruction, and outputting a data clear stream;
the playback device receives the data stream.
The applicant finds that the current descrambling method causes low data transmission efficiency, and generally improves the transmission efficiency through the installation of hardware in order to improve the transmission efficiency, but the digital television data management method of the invention utilizes the time sequence of the streaming data to mark the data packet key by considering the inherent time sequence stability of the streaming media data, so that the key information can be quickly retrieved, the data transmission efficiency is improved, and the viewing effect of the playing terminal is improved through a mode different from hardware configuration, so that the transmission rate can be further improved on the basis of improving the digital television transmission rate through hardware construction.
And further, monitoring the real-time size of the audio and video data stream according to the received instruction and setting a threshold value, and when the real-time size of the audio and video data stream is larger than or equal to the threshold value, deleting the data packet according to the time sequence number until the real-time size of the audio and video data stream is smaller than the threshold value. To prevent excessive use of the digital television memory.
Further, when the data packet is generated, the data packet is selected according to the received instruction and is backed up to a storage unit of the cloud server in real time.
Further, when the data packet backed up in the cloud service storage is downloaded according to the received instruction, the cloud server performs identity authority verification. The authentication of the identity authority here can be performed based on a cloud data integrity authentication system of a Public Key Infrastructure (PKI), and the authentication of the identity authority is performed by performing identity information authentication, which may be composed of, for example, an identity card number, a telephone number, an E-mail address, and the like.
Furthermore, when the data descrambling is failed, the descrambling is restarted, and the correctly descrambled data packet is output and played. .
Further, the data transmission rate is monitored in accordance with the received command.
In another aspect of the present invention, there is also provided a digital television data management system, including:
the receiving module is used for demodulating the signals received from the signal source address and outputting TS (transport stream) in a digital format, and processing the TS to output audio and video data streams in the digital format;
the data stream processing module is used for dividing the audio-video data stream into a plurality of data packets and generating data packet keys according to the time sequence of the data packets;
the marking module is used for marking the data packet key according to the time sequence number, selecting the data packet according to the received instruction and backing up the data packet to a storage unit of the cloud server in real time;
the encryption module is used for encrypting the data packet according to the marked data packet key;
the disassembling module is used for separating the mark from the data packet key;
the authentication module is used for descrambling data by using the data packet key separated from the mark according to the received instruction and outputting a data clear stream;
and the playing module is used for receiving the data clear stream.
Furthermore, the digital television data management system also comprises a monitoring module which is used for monitoring and processing the real-time size of the data packet; the monitoring module comprises a detection unit and a threshold value regulating and controlling unit which is associated with the detection unit, the threshold value regulating and controlling unit is used for determining a threshold value after receiving an instruction, and when the detection unit detects that the real-time size of the audio and video data stream is larger than or equal to the threshold value, the data packets are deleted according to time sequence numbers until the real-time size of the audio and video data stream is smaller than the threshold value.
Further, the data stream processing module comprises a display unit, and the display unit is used for displaying the uploading information in real time when the data packet is selected according to the received instruction and is backed up to the storage unit of the cloud server in real time.
Further, when the selected data packet is uploaded to a storage unit of the cloud service, the display unit is used for displaying the authentication result of the cloud server on the identity authority.
The invention is further described with reference to the following figures and detailed description. Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description. Or may be learned by practice of the invention.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to assist in understanding the invention, and are included to explain the invention and their equivalents and not limit it unduly. In the drawings:
FIG. 1 is a flow chart of a digital television data management method according to the present invention;
FIG. 2 is a schematic diagram of a digital television data management system according to the present invention;
labeled as: the system comprises a 1-receiving module, a 2-data stream processing module, a 201-processor unit, a 202-storage unit, a 203-communication unit, a 204-interface unit, a 205-display unit, a 3-encryption module, a 4-disassembly module, a 5-authentication module, a 6-play module, a 7-monitoring module, a 701-detection unit and a 702-threshold regulation and control unit.
Detailed Description
The invention will be described more fully hereinafter with reference to the accompanying drawings. Those skilled in the art will be able to implement the invention based on these teachings. Before the present invention is described in detail with reference to the accompanying drawings, it is to be noted that:
the technical solutions and features provided in the present invention in the respective sections including the following description may be combined with each other without conflict.
Moreover, the embodiments of the present invention described in the following description are generally only examples of a part of the present invention, and not all examples. Therefore, all other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without any creative effort shall fall within the protection scope of the present invention.
With respect to terms and units in the present invention. The term "comprises" and any variations thereof in the description and claims of this invention and the related sections are intended to cover non-exclusive inclusions.
Referring to fig. 1, the digital television data management method includes the following steps:
s101, receiving a data stream, namely receiving a high-frequency signal from a wired network by a high-frequency head;
s102, dividing a data stream into a plurality of data packets;
s103, generating a data packet key according to the time sequence of the data packet, and encrypting the data packet according to the key;
s104, adding a mark to the data packet key according to the time sequence number, wherein the mark is a mark which does not encode the content of the data packet key; the aforementioned mark is predetermined according to a preset rule, so as to facilitate the subsequent quick retrieval of the key.
S105, separating the data packet key and the mark according to the received instruction;
and S106, descrambling the data by using the data packet key separated from the mark, namely finishing channel decoding by a QAM demodulator of the digital television, and separating the transport stream gate containing audio, video and other data information from the carrier. The transport stream typically includes a plurality of audio and video streams and some data information. The demultiplexer is used to distinguish different programs, extract corresponding audio, video stream and data stream, and send them to MPEG-2 decoder and corresponding analysis software to complete the restoration of digital information. MPEG-2 decoder completes the decompression of audio and video signals, and through video encoder and audio D/A conversion, analog audio and video signals are restored to display high quality image on conventional color TV set and provide multi-channel stereo program.
The digital television generally adopts a special chip or a Digital Signal Processing (DSP) chip, and integrates a CPU core with a transport stream demultiplexer, a DVB general descrambler, an MPEG audio video decoder, and an NTSC/PAL encoder to form a core chip of the STB, so as to implement real-time demultiplexing and real-time data information processing.
By considering the inherent time sequence stability of the streaming media data, the key information is quickly retrieved by using the time sequence of the streaming data, the data transmission efficiency is increased, and the viewing effect of the playing terminal is increased by the way of distinguishing from the hardware configuration.
The scheme can be further optimized on the basis of the method, the real-time size of the data stream is monitored according to the received instruction, the threshold value is set, and when the real-time size of the data stream is larger than or equal to the threshold value, the data packet is deleted according to the time sequence number until the real-time size of the data stream is smaller than the threshold value. To prevent excessive use of the digital television memory. When the data packet is generated, the data packet is selected according to the received instruction and is backed up to a storage unit of the cloud server in real time, so that loss of real-time information is prevented.
The method comprises the following steps: s201, inputting a threshold value; s202, detecting the real-time size of the data stream, and deleting a part of data packets according to the time mark sequence when the real-time size of the detected data stream is larger than or equal to the threshold value until the real-time size of the data stream is smaller than the threshold value.
On the basis of the method, the method can further optimize the scheme, and can perform the following steps: s300, when the data packet is generated, the data packet is selected according to the received instruction and is backed up to a storage unit of the cloud server in real time.
And when the data packet backed up in the cloud service storage is downloaded according to the received instruction, the cloud server carries out identity authority verification so as to improve the safety of the data. In the implementation mode, a certificate is built in the digital television terminal, and a cloud server terminal (an authentication agent and a unified identity authentication center system) is arranged at the same time; according to a PKI certificate system, a CA system of the digital television performs user certificate online issuing on the digital television terminal in an authority range according to an authorization certificate issued by a cloud server terminal; the method comprises the steps that a user activates a user certificate under the networking condition of a digital television terminal, a public and private key pair of the user is generated according to the equipment number of the digital television terminal and hardware information set when the user leaves a factory, a local CA system of a manufacturer is accessed through a CA system certificate service interface in a local manufacturer portal, a certificate activation service is triggered, and a memory of a cloud server is accessed after the certificate activation service is completed.
Based on the method, the scheme can be further optimized, when the data descrambling is failed, the descrambling is restarted, and the data packet after the correct descrambling is output and played to prevent the information from being skipped.
On the basis of the method, a further optimization scheme can be adopted, and the data transmission rate is monitored according to the received instruction.
Referring to fig. 1 and 2, a digital television data management system includes a receiving module 1, a data stream processing module 2, an encryption module 3, a disassembly module 4, an authentication module 5, and a playing module 6. The receiving module 1, the data stream processing module 2, the encryption module, the disassembling module 4, the authentication module 5, and the playing module 6 may be configured with corresponding processors or share one or more processors, and a preset program for marking the data packet key is stored in a memory of the data stream processing module 2.
The receiving module 1 is used for demodulating a signal received from a signal source address and outputting a TS (transport stream) in a digital format, and processing the TS to output audio and video data in the digital format; a TS stream contains many PID packets, and these packets roughly contain two tables: PSI tables, program specific information, correctly find a specific program from a TS stream carrying a plurality of programs; the SI tables contain main event information (SI is an extension of PSI, and includes table information such as a Service Description Table (SDT), an Event Information Table (EIT), a Time and Date Table (TDT), a Time Offset Table (TOT), a service group association table (BAT), a Running State Table (RST), a padding table (ST), a Selection Information Table (SIT), and a Discontinuity Information Table (DIT)). In PSI tables, the following are included: a Program Association Table (PAT) whose PID is 0x00, including the PID of the TS stream and the PID of the PMT of each program of all program mapping tables, which are pointers describing detailed information of each individual program and a channel number corresponding to each PMT table; a Program Map Table (PMT) which contains a special PID and a special payload, wherein the PID of the PMT is transmitted by the PAT and describes audio and video (ES stream) PID, PCR _ PID and audio and video ECM _ PID information of a program; network Information Table (NIT), physical transport network information including all transport streams in the digital television network, contains channel tuning parameters, frequencies, symbol rates, etc. of programs, which allows a receiver to correctly decode TS streams by changing the channel, tuning parameters with little or no delay according to the user's selection. The PSI tables also includes a Conditional Access Table (CAT), the PID of which is 0x01, the CAT carries private information of the service, and the CA system needs to use the table to decrypt the program.
The data stream processing module 2 is used for dividing the audio-video data stream into a plurality of data packets, generating data packet keys according to the time sequence of the data packets, marking the data packet keys according to the time sequence numbers, selecting the data packets according to the received instructions and backing up the data packets to a storage unit of the cloud server in real time; namely, the specified fields (time mark field, source address mark field, access type field) are obtained from the received data through the existing control marking program, and the specified fields are marked in the data packet key through the encoder. The data stream processing module 2 includes a processor unit 201, a storage unit 202, a communication unit 203, and an interface unit 204, where the processor unit 201 is connected to other units and necessary hardware through data transmission lines, the processor unit 201 controls and processes signals of the other units, the processor unit 201 is a Central Processing Unit (CPU), a Digital Signal Processor (DSP), and a Graphics Processing Unit (GPU), and the storage unit 202 is a ROM or a RAM. The communication unit 203 includes a receiver and a transmitter, and the communication unit may be a communication single chip microcomputer.
The encryption module 3 is used for encrypting the data packet according to the marked data packet key; the encryption module uses the CA encryption technology, and in the digital transmission system (DVB) of CA encrypted data, the encryption module possesses triple keys, which includes: (1) a scrambling and descrambling key CW used for triggering the initial of the pseudo-random sequence generator to generate a new pseudo-random sequence to scramble and descramble the digital video signal; (2) a key ECMK1 for encrypting the Control Word (CW) to form entitlement control messages ECM; (3) the key EMMK1 is used to encrypt the user management information, which is formed by the user management system of the provider, such as the user name, address, etc., to form the entitlement management message EMM.
And the disassembling module 4 is used for separating the mark from the data packet key, and the function of the disassembling module 4 is realized by executing a preset separation program by a processor of the disassembling module.
The authentication module 5 is used for descrambling the data by using the marked data packet key according to the received instruction and outputting a data clear stream, the authentication module 5 comprises a software general scrambling and descrambling unit, a control word descrambling unit and a CA certificate,
descrambling (decryption) process: the decoder first finds PSI in the transport stream, finds the conditional access table CAT in PSI, finds the corresponding encrypted EMM information according to the EMM packet identification code (PID) given in CAT table, decrypts EMM according to the key (which may include encrypted system number, ECMK2, EMMK2, etc.) stored in the authentication module 5, determines whether the program is authorized to be watched according to the decrypted EMM information, if not, the decryption procedure is terminated, if authorized, the key decrypts ECM to obtain the control word CW, and the CW decrypts the encrypted transport stream.
And the playing module 6 is used for receiving the clear stream data.
In an optional embodiment, on the basis of the digital television data management system, the digital television data management system further includes a monitoring module 7, configured to monitor and process a real-time size of a data stream; the monitoring module 7 includes a detection unit 701 and a threshold value regulation and control unit 702 associated with the detection unit 701, the threshold value regulation and control unit 702 is configured to determine a threshold value after receiving the instruction, and when the detection unit 701 detects that the real-time size of the data stream is greater than or equal to the threshold value, delete the data packet according to the time sequence number until the real-time size of the data stream is less than the threshold value.
Firstly, when the detection unit 701 detects that the real-time size of the data stream is larger than or equal to the threshold value, the detection unit 701 sends the cleaning information and the hardware parameter of the detection unit to the processor, the processor compares the received hardware parameter, the real-time size of the data stream and the cleaning information with the determined threshold value of the received instruction, cleans redundant data packets in time according to the threshold value, and avoids occupying excessive memory.
In an optional embodiment, based on the above digital television data management system, the data stream processing module 2 includes a display unit 205, configured to display the upload information in real time when the data packet is selected according to the received instruction and the data packet is backed up to a storage unit of the cloud server in real time, and when the selected data packet backs up a storage of the cloud service, the display unit 205 is configured to display a result of authentication on the identity authority by the cloud server.
The contents of the present invention have been explained above. Those skilled in the art will be able to implement the invention based on these teachings. All other embodiments, which can be derived by a person skilled in the art from the above description without inventive step, shall fall within the scope of protection of the present invention.
Claims (10)
1. The digital television data management method is characterized by comprising the following steps: the method comprises the following steps:
receiving an audio-video data stream;
dividing the audio-video data stream into a plurality of data packets;
generating a data packet key according to the time sequence of the data packet, and encrypting the data packet according to the key;
adding a mark to the data packet key according to the time sequence number, wherein the mark is a mark which does not encode the content of the data packet key;
separating the data packet key and the tag according to the received instruction;
using the data packet key separated from the mark to descramble the data;
descrambling the data by using the marked data packet key according to the received instruction, and outputting a data clear stream;
the playback device receives the data stream.
2. The digital television data management method of claim 1, wherein: and monitoring the real-time size of the audio and video data stream according to the received instruction and setting a threshold, and deleting the data packet according to the time sequence number until the real-time size of the audio and video data stream is smaller than the threshold when the real-time size of the audio and video data stream is larger than or equal to the threshold.
3. The digital television data management method of claim 1, wherein: and when the data packet is generated, selecting the data packet according to the received instruction and backing up the data packet to a storage unit of the cloud server in real time.
4. The digital television data management method of claim 3, wherein: and when the data packet backed up in the cloud service storage is downloaded according to the received instruction, the cloud server carries out identity authority verification.
5. The digital television data management method of claim 1, wherein: when the data descrambling is failed, the descrambling is restarted, and the correctly descrambled data packet is output and played.
6. The digital television data management method of claim 1, wherein: and monitoring the data transmission rate according to the received instruction.
7. The digital television data management system is characterized in that: the method comprises the following steps:
the receiving module is used for demodulating the signals received from the signal source address and outputting TS (transport stream) in a digital format, and processing the TS to output audio and video data streams in the digital format;
the data stream processing module is used for dividing the audio-video data stream into a plurality of data packets and generating data packet keys according to the time sequence of the data packets;
the marking module is used for marking the data packet key according to the time sequence number, selecting the data packet according to the received instruction and backing up the data packet to a storage unit of the cloud server in real time; the mark is a mark which does not encode the key content of the data packet;
the encryption module is used for encrypting the data packet according to the marked data packet key;
the disassembling module is used for separating the mark from the data packet key;
the authentication module is used for descrambling data by using the data packet key separated from the mark according to the received instruction and outputting a data clear stream;
and the playing module is used for receiving the data clear stream.
8. The digital television data management system of claim 7, wherein: the monitoring module is used for monitoring and processing the real-time size of the data packet; the monitoring module comprises a detection unit and a threshold value regulating and controlling unit which is associated with the detection unit, the threshold value regulating and controlling unit is used for determining a threshold value after receiving an instruction, and when the detection unit detects that the real-time size of the audio and video data stream is larger than or equal to the threshold value, the data packets are deleted according to time sequence numbers until the real-time size of the audio and video data stream is smaller than the threshold value.
9. The digital television data management system of claim 7, wherein: the data stream processing module comprises a display module used for displaying the uploading information in real time when the data packet is selected according to the received instruction and is backed up to the storage unit of the cloud server in real time.
10. The digital television data management system of claim 9, wherein: when the selected data packet is uploaded to a storage unit of the cloud service, the display module is used for displaying the authentication result of the cloud server on the identity authority.
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| CN104469407A (en) * | 2014-12-25 | 2015-03-25 | 山东泰信电子股份有限公司 | Method and system for ensuring digital television program content safety and scrambling device |
| CN107749999A (en) * | 2017-09-28 | 2018-03-02 | 高斯贝尔数码科技股份有限公司 | Parallel method inside a kind of digital television conditional access system |
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| CN104469407A (en) * | 2014-12-25 | 2015-03-25 | 山东泰信电子股份有限公司 | Method and system for ensuring digital television program content safety and scrambling device |
| CN107749999A (en) * | 2017-09-28 | 2018-03-02 | 高斯贝尔数码科技股份有限公司 | Parallel method inside a kind of digital television conditional access system |
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